Seismicity Caused by Magma Intrusion, Episodic Degassing, and Resonance in Gas-filled Chambers at Ruapehu Volcano, New Zealand: A Record of 20 Years of Activity, 1971 to 1990 |
Contents
INTRODUCTION | 1 |
QUANTITATIVE ESTIMATE OF SEISMICITY DURING THE PERIOD | 9 |
MODE OF OCCURRENCE | 15 |
Copyright | |
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Common terms and phrases
A-type activity at Ruapehu APR MAY JUN April AUG SEP OCT B-type B/C-type C-type volcanic earthquake correlate Crater Lake day U.T. discrete measurements Dome dominant frequency duration earthquakes at Ruapehu ERUPTIO ERUPTION COLUMN km eruption seen HEIGHT OF ERUPTION Ho max Inferred eruption JUL AUG SEP JUN JUL AUG Lahar volumes LAHARĀ¹ ACCOM lake level Latter magma MAGNITUDE2 OF ACCOM MAX MAGNITUDE2 measured at Karioi minute Day minute NZST/NZDT N.Z. Volc Nairn near-vent volcano-tectonic earthquakes Ngauruhoe Nil Steam NZDT NZST OBSERVED BY VOL observed eruption began onset Otway Nil PANYING VOLCANIC mĀ³ phase radiated seismic energy recorded at DRZ seismograph seismometer SEP OCT NOV Small eruption Small hydrothermal eruption small volcanic earthquake smaller lahars Steam clouds steam eruptions swarm Tama Lake tectonic earthquakes Tongariro National Park upwelling volcanic earthquake sequence volcanic tremor Volcano-seismic activity volumes were measured water jets waves Whakapapa Whangaehu River